Title:
SAFETY DEVICE FOR ELEVATOR
Document Type and Number:
WIPO Patent Application WO/2011/048664
Kind Code:
A1
Abstract:
Provided is a safety device for an elevator wherein failure can be reliably detected in each of two relay drivers provided in correspondence with relays for interrupting power supply to a motor or a brake. The cooperative operation such that one of a first or a second arithmetic unit outputs a drive command while the other of the first or the second arithmetic unit outputs an interruption command is carried out, and the first and second arithmetic units are so configured as to perform the diagnosis of failure in the first and second drivers based on the output state of a contact signal for diagnosis from a contact signal output unit during the cooperative operation.
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Inventors:
HASHIMOTO JUN (JP)
SHIBATA MASUNORI (JP)
SHIBATA MASUNORI (JP)
Application Number:
PCT/JP2009/068056
Publication Date:
April 28, 2011
Filing Date:
October 20, 2009
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
HASHIMOTO JUN (JP)
SHIBATA MASUNORI (JP)
HASHIMOTO JUN (JP)
SHIBATA MASUNORI (JP)
International Classes:
B66B5/02
Domestic Patent References:
| WO2004076326A1 | 2004-09-10 | |||
| WO2008012896A1 | 2008-01-31 | |||
| WO2008152722A1 | 2008-12-18 |
Foreign References:
| JP2007510608A | 2007-04-26 | |||
| JP2009023820A | 2009-02-05 |
Attorney, Agent or Firm:
TAKADA, Mamoru et al. (JP)
Takada 守 (JP)
Takada 守 (JP)
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